To be fair, there's an equal amount of trash software available from your laptop/desktop as well, the only difference being that there isn't a centralized repository that it all must go through; the trash heap that rests under the app stores was inevitable, since such junk was always going to exist and people would find a way to sell it.

What I find interesting is that everyone's trying to make the next big game or consumer app, a market that's already insanely saturated.

Meanwhile a single decent professional piano tuning app can sell for $500 (I don't know the sales numbers of course) with the most amateur-looking UI ever and a description that's a warning not to buy it.

Considering that most games get lost in the heap and sell basically nothing, maybe looking to see if there's some niche tool you could make instead isn't a bad idea.

Well to be fair, it's priced at $500, and aside from the single point of reference, I wonder how many have been sold.